<!DOCTYPE html>
<html lang="zh">
<head>
    <meta charset="UTF-8">
    <title>极光登录</title>
    <style>
        body {
            margin: 0;
            height: 100vh;
            background: #0a192f;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            display: flex;
            justify-content: center;
            align-items: center;
            overflow: hidden;
        }
        
        .aurora-bg {
            position: absolute;
            width: 100%;
            height: 100%;
            background: linear-gradient(45deg, #0a192f, #172a45, #303a52);
            z-index: -2;
        }
        
        .aurora {
            position: absolute;
            width: 200%;
            height: 200%;
            background: 
                radial-gradient(circle at 20% 30%, rgba(100, 255, 218, 0.2), transparent 30%),
                radial-gradient(circle at 80% 70%, rgba(0, 180, 216, 0.2), transparent 30%),
                radial-gradient(circle at 40% 60%, rgba(152, 193, 217, 0.2), transparent 30%);
            animation: aurora-move 30s infinite alternate;
            z-index: -1;
        }
        
        @keyframes aurora-move {
            0% { transform: translate(0, 0); }
            25% { transform: translate(-25%, -15%); }
            50% { transform: translate(-50%, -5%); }
            75% { transform: translate(-25%, 15%); }
            100% { transform: translate(0, 0); }
        }
        
        .login-card {
            width: 350px;
            padding: 40px;
            background: rgba(10, 25, 47, 0.7);
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
            backdrop-filter: blur(5px);
            border: 1px solid rgba(100, 255, 218, 0.2);
            transition: all 0.3s;
        }
        
        .login-card:hover {
            border-color: rgba(100, 255, 218, 0.4);
            box-shadow: 0 15px 35px rgba(0, 180, 216, 0.2);
        }
        
        h2 {
            color: #64ffda;
            text-align: center;
            margin-bottom: 30px;
            font-weight: 500;
        }
        
        .input-field {
            position: relative;
            margin-bottom: 30px;
        }
        
        input {
            width: 100%;
            padding: 15px 0 5px;
            background: transparent;
            border: none;
            border-bottom: 1px solid #64ffda;
            color: #ccd6f6;
            font-size: 16px;
        }
        
        input:focus {
            outline: none;
            border-bottom-color: #0af;
        }
        
        label {
            position: absolute;
            left: 0;
            top: 15px;
            color: rgba(100, 255, 218, 0.7);
            transition: all 0.3s;
            pointer-events: none;
        }
        
        input:focus ~ label,
        input:valid ~ label {
            top: -10px;
            font-size: 12px;
            color: #0af;
        }
        
        .btn {
            width: 100%;
            padding: 15px;
            background: transparent;
            border: 1px solid #64ffda;
            color: #64ffda;
            font-size: 16px;
            cursor: pointer;
            transition: all 0.3s;
            position: relative;
            overflow: hidden;
        }
        
        .btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(
                90deg,
                transparent,
                rgba(100, 255, 218, 0.2),
                transparent
            );
            transition: 0.5s;
        }
        
        .btn:hover::before {
            left: 100%;
        }
        
        .btn:hover {
            background: rgba(100, 255, 218, 0.1);
        }
    </style>
</head>
<body>
    <div class="aurora-bg"></div>
    <div class="aurora"></div>
    
    <div class="login-card">
        <h2>极光通行证</h2>
        <div class="input-field">
            <input type="text" id="aurora-user" required>
            <label for="aurora-user">用户名</label>
        </div>
        <div class="input-field">
            <input type="password" id="aurora-pass" required>
            <label for="aurora-pass">密码</label>
        </div>
        <button class="btn">进入系统</button>
    </div>
</body>
</html>